Ch 6 page 33 ELECTRICAL SYSTEM DC - DC converter Figure 57 USB charger AlfaTronix PVPro-S Figure 58 SHOP MANUAL Part number PV12s Cont/Int Power 12A/18A non-isolated Nominal Voltage 24Vdc input, 12Vdc output Dimensions 127 x 87 x 50 mm Weight 405g Input voltage range 17-32 Vdc Output voltage 13.6 Vdc +15% -20% at extremes of temperature, load and input tolerance. Operating temperature -25 °C to +30 °C +30 °C to +80 °C de rate linearly to 0A Dimensions Ø37 x 33, hole Ø30 mm Weight 20g Input voltage 9 - 32 Vdc Output Voltage 5Vdc ± 0.2V Output Power 2.1A (single) 3.0A(double) - max 1.5A per socket Offload current Power conversion efficiency 90% Operating temperature -25°C to +50°C